Mercurial > hg > truffle
annotate src/share/vm/opto/node.hpp @ 6086:cdd249497b34
7170053: crash in C2 when using -XX:+CountCompiledCalls
Reviewed-by: kvn, twisti
Contributed-by: Krystal Mok <sajia@taobao.com>
author | twisti |
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date | Fri, 18 May 2012 12:20:24 -0700 |
parents | 35acf8f0a2e4 |
children | 8c92982cbbc4 |
rev | line source |
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0 | 1 /* |
3939 | 2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_OPTO_NODE_HPP |
26 #define SHARE_VM_OPTO_NODE_HPP | |
27 | |
28 #include "libadt/port.hpp" | |
29 #include "libadt/vectset.hpp" | |
30 #include "opto/compile.hpp" | |
31 #include "opto/type.hpp" | |
32 | |
0 | 33 // Portions of code courtesy of Clifford Click |
34 | |
35 // Optimization - Graph Style | |
36 | |
37 | |
38 class AbstractLockNode; | |
39 class AddNode; | |
40 class AddPNode; | |
41 class AliasInfo; | |
42 class AllocateArrayNode; | |
43 class AllocateNode; | |
44 class Block; | |
45 class Block_Array; | |
46 class BoolNode; | |
47 class BoxLockNode; | |
48 class CMoveNode; | |
49 class CallDynamicJavaNode; | |
50 class CallJavaNode; | |
51 class CallLeafNode; | |
52 class CallNode; | |
53 class CallRuntimeNode; | |
54 class CallStaticJavaNode; | |
55 class CatchNode; | |
56 class CatchProjNode; | |
57 class CheckCastPPNode; | |
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58 class ClearArrayNode; |
0 | 59 class CmpNode; |
60 class CodeBuffer; | |
61 class ConstraintCastNode; | |
62 class ConNode; | |
63 class CountedLoopNode; | |
64 class CountedLoopEndNode; | |
168
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65 class DecodeNNode; |
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66 class EncodePNode; |
0 | 67 class FastLockNode; |
68 class FastUnlockNode; | |
69 class IfNode; | |
3842 | 70 class IfFalseNode; |
71 class IfTrueNode; | |
0 | 72 class InitializeNode; |
73 class JVMState; | |
74 class JumpNode; | |
75 class JumpProjNode; | |
76 class LoadNode; | |
77 class LoadStoreNode; | |
78 class LockNode; | |
79 class LoopNode; | |
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80 class MachBranchNode; |
0 | 81 class MachCallDynamicJavaNode; |
82 class MachCallJavaNode; | |
83 class MachCallLeafNode; | |
84 class MachCallNode; | |
85 class MachCallRuntimeNode; | |
86 class MachCallStaticJavaNode; | |
2008 | 87 class MachConstantBaseNode; |
88 class MachConstantNode; | |
3842 | 89 class MachGotoNode; |
0 | 90 class MachIfNode; |
91 class MachNode; | |
92 class MachNullCheckNode; | |
3842 | 93 class MachProjNode; |
0 | 94 class MachReturnNode; |
95 class MachSafePointNode; | |
96 class MachSpillCopyNode; | |
97 class MachTempNode; | |
98 class Matcher; | |
99 class MemBarNode; | |
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100 class MemBarStoreStoreNode; |
0 | 101 class MemNode; |
102 class MergeMemNode; | |
103 class MultiNode; | |
104 class MultiBranchNode; | |
105 class NeverBranchNode; | |
106 class Node; | |
107 class Node_Array; | |
108 class Node_List; | |
109 class Node_Stack; | |
110 class NullCheckNode; | |
111 class OopMap; | |
33 | 112 class ParmNode; |
0 | 113 class PCTableNode; |
114 class PhaseCCP; | |
115 class PhaseGVN; | |
116 class PhaseIterGVN; | |
117 class PhaseRegAlloc; | |
118 class PhaseTransform; | |
119 class PhaseValues; | |
120 class PhiNode; | |
121 class Pipeline; | |
122 class ProjNode; | |
123 class RegMask; | |
124 class RegionNode; | |
125 class RootNode; | |
126 class SafePointNode; | |
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127 class SafePointScalarObjectNode; |
0 | 128 class StartNode; |
129 class State; | |
130 class StoreNode; | |
131 class SubNode; | |
132 class Type; | |
133 class TypeNode; | |
134 class UnlockNode; | |
3842 | 135 class VectorNode; |
136 class VectorLoadNode; | |
137 class VectorStoreNode; | |
0 | 138 class VectorSet; |
139 typedef void (*NFunc)(Node&,void*); | |
140 extern "C" { | |
141 typedef int (*C_sort_func_t)(const void *, const void *); | |
142 } | |
143 | |
144 // The type of all node counts and indexes. | |
145 // It must hold at least 16 bits, but must also be fast to load and store. | |
146 // This type, if less than 32 bits, could limit the number of possible nodes. | |
147 // (To make this type platform-specific, move to globalDefinitions_xxx.hpp.) | |
148 typedef unsigned int node_idx_t; | |
149 | |
150 | |
151 #ifndef OPTO_DU_ITERATOR_ASSERT | |
152 #ifdef ASSERT | |
153 #define OPTO_DU_ITERATOR_ASSERT 1 | |
154 #else | |
155 #define OPTO_DU_ITERATOR_ASSERT 0 | |
156 #endif | |
157 #endif //OPTO_DU_ITERATOR_ASSERT | |
158 | |
159 #if OPTO_DU_ITERATOR_ASSERT | |
160 class DUIterator; | |
161 class DUIterator_Fast; | |
162 class DUIterator_Last; | |
163 #else | |
164 typedef uint DUIterator; | |
165 typedef Node** DUIterator_Fast; | |
166 typedef Node** DUIterator_Last; | |
167 #endif | |
168 | |
169 // Node Sentinel | |
170 #define NodeSentinel (Node*)-1 | |
171 | |
172 // Unknown count frequency | |
173 #define COUNT_UNKNOWN (-1.0f) | |
174 | |
175 //------------------------------Node------------------------------------------- | |
176 // Nodes define actions in the program. They create values, which have types. | |
177 // They are both vertices in a directed graph and program primitives. Nodes | |
178 // are labeled; the label is the "opcode", the primitive function in the lambda | |
179 // calculus sense that gives meaning to the Node. Node inputs are ordered (so | |
180 // that "a-b" is different from "b-a"). The inputs to a Node are the inputs to | |
181 // the Node's function. These inputs also define a Type equation for the Node. | |
182 // Solving these Type equations amounts to doing dataflow analysis. | |
183 // Control and data are uniformly represented in the graph. Finally, Nodes | |
184 // have a unique dense integer index which is used to index into side arrays | |
185 // whenever I have phase-specific information. | |
186 | |
187 class Node { | |
3939 | 188 friend class VMStructs; |
189 | |
0 | 190 // Lots of restrictions on cloning Nodes |
191 Node(const Node&); // not defined; linker error to use these | |
192 Node &operator=(const Node &rhs); | |
193 | |
194 public: | |
195 friend class Compile; | |
196 #if OPTO_DU_ITERATOR_ASSERT | |
197 friend class DUIterator_Common; | |
198 friend class DUIterator; | |
199 friend class DUIterator_Fast; | |
200 friend class DUIterator_Last; | |
201 #endif | |
202 | |
203 // Because Nodes come and go, I define an Arena of Node structures to pull | |
204 // from. This should allow fast access to node creation & deletion. This | |
205 // field is a local cache of a value defined in some "program fragment" for | |
206 // which these Nodes are just a part of. | |
207 | |
208 // New Operator that takes a Compile pointer, this will eventually | |
209 // be the "new" New operator. | |
210 inline void* operator new( size_t x, Compile* C) { | |
211 Node* n = (Node*)C->node_arena()->Amalloc_D(x); | |
212 #ifdef ASSERT | |
213 n->_in = (Node**)n; // magic cookie for assertion check | |
214 #endif | |
215 n->_out = (Node**)C; | |
216 return (void*)n; | |
217 } | |
218 | |
219 // New Operator that takes a Compile pointer, this will eventually | |
220 // be the "new" New operator. | |
221 inline void* operator new( size_t x, Compile* C, int y) { | |
222 Node* n = (Node*)C->node_arena()->Amalloc_D(x + y*sizeof(void*)); | |
223 n->_in = (Node**)(((char*)n) + x); | |
224 #ifdef ASSERT | |
225 n->_in[y-1] = n; // magic cookie for assertion check | |
226 #endif | |
227 n->_out = (Node**)C; | |
228 return (void*)n; | |
229 } | |
230 | |
231 // Delete is a NOP | |
232 void operator delete( void *ptr ) {} | |
233 // Fancy destructor; eagerly attempt to reclaim Node numberings and storage | |
234 void destruct(); | |
235 | |
236 // Create a new Node. Required is the number is of inputs required for | |
237 // semantic correctness. | |
238 Node( uint required ); | |
239 | |
240 // Create a new Node with given input edges. | |
241 // This version requires use of the "edge-count" new. | |
242 // E.g. new (C,3) FooNode( C, NULL, left, right ); | |
243 Node( Node *n0 ); | |
244 Node( Node *n0, Node *n1 ); | |
245 Node( Node *n0, Node *n1, Node *n2 ); | |
246 Node( Node *n0, Node *n1, Node *n2, Node *n3 ); | |
247 Node( Node *n0, Node *n1, Node *n2, Node *n3, Node *n4 ); | |
248 Node( Node *n0, Node *n1, Node *n2, Node *n3, Node *n4, Node *n5 ); | |
249 Node( Node *n0, Node *n1, Node *n2, Node *n3, | |
250 Node *n4, Node *n5, Node *n6 ); | |
251 | |
252 // Clone an inherited Node given only the base Node type. | |
253 Node* clone() const; | |
254 | |
255 // Clone a Node, immediately supplying one or two new edges. | |
256 // The first and second arguments, if non-null, replace in(1) and in(2), | |
257 // respectively. | |
258 Node* clone_with_data_edge(Node* in1, Node* in2 = NULL) const { | |
259 Node* nn = clone(); | |
260 if (in1 != NULL) nn->set_req(1, in1); | |
261 if (in2 != NULL) nn->set_req(2, in2); | |
262 return nn; | |
263 } | |
264 | |
265 private: | |
266 // Shared setup for the above constructors. | |
267 // Handles all interactions with Compile::current. | |
268 // Puts initial values in all Node fields except _idx. | |
269 // Returns the initial value for _idx, which cannot | |
270 // be initialized by assignment. | |
271 inline int Init(int req, Compile* C); | |
272 | |
273 //----------------- input edge handling | |
274 protected: | |
275 friend class PhaseCFG; // Access to address of _in array elements | |
276 Node **_in; // Array of use-def references to Nodes | |
277 Node **_out; // Array of def-use references to Nodes | |
278 | |
605 | 279 // Input edges are split into two categories. Required edges are required |
0 | 280 // for semantic correctness; order is important and NULLs are allowed. |
281 // Precedence edges are used to help determine execution order and are | |
282 // added, e.g., for scheduling purposes. They are unordered and not | |
283 // duplicated; they have no embedded NULLs. Edges from 0 to _cnt-1 | |
284 // are required, from _cnt to _max-1 are precedence edges. | |
285 node_idx_t _cnt; // Total number of required Node inputs. | |
286 | |
287 node_idx_t _max; // Actual length of input array. | |
288 | |
289 // Output edges are an unordered list of def-use edges which exactly | |
290 // correspond to required input edges which point from other nodes | |
291 // to this one. Thus the count of the output edges is the number of | |
292 // users of this node. | |
293 node_idx_t _outcnt; // Total number of Node outputs. | |
294 | |
295 node_idx_t _outmax; // Actual length of output array. | |
296 | |
297 // Grow the actual input array to the next larger power-of-2 bigger than len. | |
298 void grow( uint len ); | |
299 // Grow the output array to the next larger power-of-2 bigger than len. | |
300 void out_grow( uint len ); | |
301 | |
302 public: | |
303 // Each Node is assigned a unique small/dense number. This number is used | |
304 // to index into auxiliary arrays of data and bitvectors. | |
305 // It is declared const to defend against inadvertant assignment, | |
306 // since it is used by clients as a naked field. | |
307 const node_idx_t _idx; | |
308 | |
309 // Get the (read-only) number of input edges | |
310 uint req() const { return _cnt; } | |
311 uint len() const { return _max; } | |
312 // Get the (read-only) number of output edges | |
313 uint outcnt() const { return _outcnt; } | |
314 | |
315 #if OPTO_DU_ITERATOR_ASSERT | |
316 // Iterate over the out-edges of this node. Deletions are illegal. | |
317 inline DUIterator outs() const; | |
318 // Use this when the out array might have changed to suppress asserts. | |
319 inline DUIterator& refresh_out_pos(DUIterator& i) const; | |
320 // Does the node have an out at this position? (Used for iteration.) | |
321 inline bool has_out(DUIterator& i) const; | |
322 inline Node* out(DUIterator& i) const; | |
323 // Iterate over the out-edges of this node. All changes are illegal. | |
324 inline DUIterator_Fast fast_outs(DUIterator_Fast& max) const; | |
325 inline Node* fast_out(DUIterator_Fast& i) const; | |
326 // Iterate over the out-edges of this node, deleting one at a time. | |
327 inline DUIterator_Last last_outs(DUIterator_Last& min) const; | |
328 inline Node* last_out(DUIterator_Last& i) const; | |
329 // The inline bodies of all these methods are after the iterator definitions. | |
330 #else | |
331 // Iterate over the out-edges of this node. Deletions are illegal. | |
332 // This iteration uses integral indexes, to decouple from array reallocations. | |
333 DUIterator outs() const { return 0; } | |
334 // Use this when the out array might have changed to suppress asserts. | |
335 DUIterator refresh_out_pos(DUIterator i) const { return i; } | |
336 | |
337 // Reference to the i'th output Node. Error if out of bounds. | |
338 Node* out(DUIterator i) const { assert(i < _outcnt, "oob"); return _out[i]; } | |
339 // Does the node have an out at this position? (Used for iteration.) | |
340 bool has_out(DUIterator i) const { return i < _outcnt; } | |
341 | |
342 // Iterate over the out-edges of this node. All changes are illegal. | |
343 // This iteration uses a pointer internal to the out array. | |
344 DUIterator_Fast fast_outs(DUIterator_Fast& max) const { | |
345 Node** out = _out; | |
346 // Assign a limit pointer to the reference argument: | |
347 max = out + (ptrdiff_t)_outcnt; | |
348 // Return the base pointer: | |
349 return out; | |
350 } | |
351 Node* fast_out(DUIterator_Fast i) const { return *i; } | |
352 // Iterate over the out-edges of this node, deleting one at a time. | |
353 // This iteration uses a pointer internal to the out array. | |
354 DUIterator_Last last_outs(DUIterator_Last& min) const { | |
355 Node** out = _out; | |
356 // Assign a limit pointer to the reference argument: | |
357 min = out; | |
358 // Return the pointer to the start of the iteration: | |
359 return out + (ptrdiff_t)_outcnt - 1; | |
360 } | |
361 Node* last_out(DUIterator_Last i) const { return *i; } | |
362 #endif | |
363 | |
364 // Reference to the i'th input Node. Error if out of bounds. | |
365 Node* in(uint i) const { assert(i < _max,"oob"); return _in[i]; } | |
366 // Reference to the i'th output Node. Error if out of bounds. | |
367 // Use this accessor sparingly. We are going trying to use iterators instead. | |
368 Node* raw_out(uint i) const { assert(i < _outcnt,"oob"); return _out[i]; } | |
369 // Return the unique out edge. | |
370 Node* unique_out() const { assert(_outcnt==1,"not unique"); return _out[0]; } | |
371 // Delete out edge at position 'i' by moving last out edge to position 'i' | |
372 void raw_del_out(uint i) { | |
373 assert(i < _outcnt,"oob"); | |
374 assert(_outcnt > 0,"oob"); | |
375 #if OPTO_DU_ITERATOR_ASSERT | |
376 // Record that a change happened here. | |
377 debug_only(_last_del = _out[i]; ++_del_tick); | |
378 #endif | |
379 _out[i] = _out[--_outcnt]; | |
380 // Smash the old edge so it can't be used accidentally. | |
381 debug_only(_out[_outcnt] = (Node *)(uintptr_t)0xdeadbeef); | |
382 } | |
383 | |
384 #ifdef ASSERT | |
385 bool is_dead() const; | |
386 #define is_not_dead(n) ((n) == NULL || !VerifyIterativeGVN || !((n)->is_dead())) | |
387 #endif | |
388 | |
389 // Set a required input edge, also updates corresponding output edge | |
390 void add_req( Node *n ); // Append a NEW required input | |
391 void add_req_batch( Node* n, uint m ); // Append m NEW required inputs (all n). | |
392 void del_req( uint idx ); // Delete required edge & compact | |
393 void ins_req( uint i, Node *n ); // Insert a NEW required input | |
394 void set_req( uint i, Node *n ) { | |
395 assert( is_not_dead(n), "can not use dead node"); | |
396 assert( i < _cnt, "oob"); | |
397 assert( !VerifyHashTableKeys || _hash_lock == 0, | |
398 "remove node from hash table before modifying it"); | |
399 Node** p = &_in[i]; // cache this._in, across the del_out call | |
400 if (*p != NULL) (*p)->del_out((Node *)this); | |
401 (*p) = n; | |
402 if (n != NULL) n->add_out((Node *)this); | |
403 } | |
404 // Light version of set_req() to init inputs after node creation. | |
405 void init_req( uint i, Node *n ) { | |
406 assert( i == 0 && this == n || | |
407 is_not_dead(n), "can not use dead node"); | |
408 assert( i < _cnt, "oob"); | |
409 assert( !VerifyHashTableKeys || _hash_lock == 0, | |
410 "remove node from hash table before modifying it"); | |
411 assert( _in[i] == NULL, "sanity"); | |
412 _in[i] = n; | |
413 if (n != NULL) n->add_out((Node *)this); | |
414 } | |
415 // Find first occurrence of n among my edges: | |
416 int find_edge(Node* n); | |
417 int replace_edge(Node* old, Node* neww); | |
418 // NULL out all inputs to eliminate incoming Def-Use edges. | |
419 // Return the number of edges between 'n' and 'this' | |
420 int disconnect_inputs(Node *n); | |
421 | |
422 // Quickly, return true if and only if I am Compile::current()->top(). | |
423 bool is_top() const { | |
424 assert((this == (Node*) Compile::current()->top()) == (_out == NULL), ""); | |
425 return (_out == NULL); | |
426 } | |
427 // Reaffirm invariants for is_top. (Only from Compile::set_cached_top_node.) | |
428 void setup_is_top(); | |
429 | |
430 // Strip away casting. (It is depth-limited.) | |
431 Node* uncast() const; | |
4778 | 432 // Return whether two Nodes are equivalent, after stripping casting. |
433 bool eqv_uncast(const Node* n) const { | |
434 return (this->uncast() == n->uncast()); | |
435 } | |
0 | 436 |
437 private: | |
438 static Node* uncast_helper(const Node* n); | |
439 | |
440 // Add an output edge to the end of the list | |
441 void add_out( Node *n ) { | |
442 if (is_top()) return; | |
443 if( _outcnt == _outmax ) out_grow(_outcnt); | |
444 _out[_outcnt++] = n; | |
445 } | |
446 // Delete an output edge | |
447 void del_out( Node *n ) { | |
448 if (is_top()) return; | |
449 Node** outp = &_out[_outcnt]; | |
450 // Find and remove n | |
451 do { | |
452 assert(outp > _out, "Missing Def-Use edge"); | |
453 } while (*--outp != n); | |
454 *outp = _out[--_outcnt]; | |
455 // Smash the old edge so it can't be used accidentally. | |
456 debug_only(_out[_outcnt] = (Node *)(uintptr_t)0xdeadbeef); | |
457 // Record that a change happened here. | |
458 #if OPTO_DU_ITERATOR_ASSERT | |
459 debug_only(_last_del = n; ++_del_tick); | |
460 #endif | |
461 } | |
462 | |
463 public: | |
464 // Globally replace this node by a given new node, updating all uses. | |
465 void replace_by(Node* new_node); | |
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466 // Globally replace this node by a given new node, updating all uses |
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467 // and cutting input edges of old node. |
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468 void subsume_by(Node* new_node) { |
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469 replace_by(new_node); |
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470 disconnect_inputs(NULL); |
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471 } |
0 | 472 void set_req_X( uint i, Node *n, PhaseIterGVN *igvn ); |
473 // Find the one non-null required input. RegionNode only | |
474 Node *nonnull_req() const; | |
475 // Add or remove precedence edges | |
476 void add_prec( Node *n ); | |
477 void rm_prec( uint i ); | |
478 void set_prec( uint i, Node *n ) { | |
479 assert( is_not_dead(n), "can not use dead node"); | |
480 assert( i >= _cnt, "not a precedence edge"); | |
481 if (_in[i] != NULL) _in[i]->del_out((Node *)this); | |
482 _in[i] = n; | |
483 if (n != NULL) n->add_out((Node *)this); | |
484 } | |
485 // Set this node's index, used by cisc_version to replace current node | |
486 void set_idx(uint new_idx) { | |
487 const node_idx_t* ref = &_idx; | |
488 *(node_idx_t*)ref = new_idx; | |
489 } | |
490 // Swap input edge order. (Edge indexes i1 and i2 are usually 1 and 2.) | |
491 void swap_edges(uint i1, uint i2) { | |
492 debug_only(uint check_hash = (VerifyHashTableKeys && _hash_lock) ? hash() : NO_HASH); | |
493 // Def-Use info is unchanged | |
494 Node* n1 = in(i1); | |
495 Node* n2 = in(i2); | |
496 _in[i1] = n2; | |
497 _in[i2] = n1; | |
498 // If this node is in the hash table, make sure it doesn't need a rehash. | |
499 assert(check_hash == NO_HASH || check_hash == hash(), "edge swap must preserve hash code"); | |
500 } | |
501 | |
502 // Iterators over input Nodes for a Node X are written as: | |
503 // for( i = 0; i < X.req(); i++ ) ... X[i] ... | |
504 // NOTE: Required edges can contain embedded NULL pointers. | |
505 | |
506 //----------------- Other Node Properties | |
507 | |
508 // Generate class id for some ideal nodes to avoid virtual query | |
509 // methods is_<Node>(). | |
510 // Class id is the set of bits corresponded to the node class and all its | |
511 // super classes so that queries for super classes are also valid. | |
512 // Subclasses of the same super class have different assigned bit | |
513 // (the third parameter in the macro DEFINE_CLASS_ID). | |
514 // Classes with deeper hierarchy are declared first. | |
515 // Classes with the same hierarchy depth are sorted by usage frequency. | |
516 // | |
517 // The query method masks the bits to cut off bits of subclasses | |
518 // and then compare the result with the class id | |
519 // (see the macro DEFINE_CLASS_QUERY below). | |
520 // | |
521 // Class_MachCall=30, ClassMask_MachCall=31 | |
522 // 12 8 4 0 | |
523 // 0 0 0 0 0 0 0 0 1 1 1 1 0 | |
524 // | | | | | |
525 // | | | Bit_Mach=2 | |
526 // | | Bit_MachReturn=4 | |
527 // | Bit_MachSafePoint=8 | |
528 // Bit_MachCall=16 | |
529 // | |
530 // Class_CountedLoop=56, ClassMask_CountedLoop=63 | |
531 // 12 8 4 0 | |
532 // 0 0 0 0 0 0 0 1 1 1 0 0 0 | |
533 // | | | | |
534 // | | Bit_Region=8 | |
535 // | Bit_Loop=16 | |
536 // Bit_CountedLoop=32 | |
537 | |
538 #define DEFINE_CLASS_ID(cl, supcl, subn) \ | |
539 Bit_##cl = (Class_##supcl == 0) ? 1 << subn : (Bit_##supcl) << (1 + subn) , \ | |
540 Class_##cl = Class_##supcl + Bit_##cl , \ | |
541 ClassMask_##cl = ((Bit_##cl << 1) - 1) , | |
542 | |
543 // This enum is used only for C2 ideal and mach nodes with is_<node>() methods | |
544 // so that it's values fits into 16 bits. | |
545 enum NodeClasses { | |
546 Bit_Node = 0x0000, | |
547 Class_Node = 0x0000, | |
548 ClassMask_Node = 0xFFFF, | |
549 | |
550 DEFINE_CLASS_ID(Multi, Node, 0) | |
551 DEFINE_CLASS_ID(SafePoint, Multi, 0) | |
552 DEFINE_CLASS_ID(Call, SafePoint, 0) | |
553 DEFINE_CLASS_ID(CallJava, Call, 0) | |
554 DEFINE_CLASS_ID(CallStaticJava, CallJava, 0) | |
555 DEFINE_CLASS_ID(CallDynamicJava, CallJava, 1) | |
556 DEFINE_CLASS_ID(CallRuntime, Call, 1) | |
557 DEFINE_CLASS_ID(CallLeaf, CallRuntime, 0) | |
558 DEFINE_CLASS_ID(Allocate, Call, 2) | |
559 DEFINE_CLASS_ID(AllocateArray, Allocate, 0) | |
560 DEFINE_CLASS_ID(AbstractLock, Call, 3) | |
561 DEFINE_CLASS_ID(Lock, AbstractLock, 0) | |
562 DEFINE_CLASS_ID(Unlock, AbstractLock, 1) | |
563 DEFINE_CLASS_ID(MultiBranch, Multi, 1) | |
564 DEFINE_CLASS_ID(PCTable, MultiBranch, 0) | |
565 DEFINE_CLASS_ID(Catch, PCTable, 0) | |
566 DEFINE_CLASS_ID(Jump, PCTable, 1) | |
567 DEFINE_CLASS_ID(If, MultiBranch, 1) | |
568 DEFINE_CLASS_ID(CountedLoopEnd, If, 0) | |
569 DEFINE_CLASS_ID(NeverBranch, MultiBranch, 2) | |
570 DEFINE_CLASS_ID(Start, Multi, 2) | |
571 DEFINE_CLASS_ID(MemBar, Multi, 3) | |
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572 DEFINE_CLASS_ID(Initialize, MemBar, 0) |
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573 DEFINE_CLASS_ID(MemBarStoreStore, MemBar, 1) |
0 | 574 |
575 DEFINE_CLASS_ID(Mach, Node, 1) | |
576 DEFINE_CLASS_ID(MachReturn, Mach, 0) | |
577 DEFINE_CLASS_ID(MachSafePoint, MachReturn, 0) | |
578 DEFINE_CLASS_ID(MachCall, MachSafePoint, 0) | |
579 DEFINE_CLASS_ID(MachCallJava, MachCall, 0) | |
580 DEFINE_CLASS_ID(MachCallStaticJava, MachCallJava, 0) | |
581 DEFINE_CLASS_ID(MachCallDynamicJava, MachCallJava, 1) | |
582 DEFINE_CLASS_ID(MachCallRuntime, MachCall, 1) | |
583 DEFINE_CLASS_ID(MachCallLeaf, MachCallRuntime, 0) | |
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584 DEFINE_CLASS_ID(MachBranch, Mach, 1) |
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585 DEFINE_CLASS_ID(MachIf, MachBranch, 0) |
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586 DEFINE_CLASS_ID(MachGoto, MachBranch, 1) |
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587 DEFINE_CLASS_ID(MachNullCheck, MachBranch, 2) |
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588 DEFINE_CLASS_ID(MachSpillCopy, Mach, 2) |
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589 DEFINE_CLASS_ID(MachTemp, Mach, 3) |
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590 DEFINE_CLASS_ID(MachConstantBase, Mach, 4) |
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591 DEFINE_CLASS_ID(MachConstant, Mach, 5) |
0 | 592 |
3842 | 593 DEFINE_CLASS_ID(Type, Node, 2) |
0 | 594 DEFINE_CLASS_ID(Phi, Type, 0) |
595 DEFINE_CLASS_ID(ConstraintCast, Type, 1) | |
596 DEFINE_CLASS_ID(CheckCastPP, Type, 2) | |
597 DEFINE_CLASS_ID(CMove, Type, 3) | |
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598 DEFINE_CLASS_ID(SafePointScalarObject, Type, 4) |
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599 DEFINE_CLASS_ID(DecodeN, Type, 5) |
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600 DEFINE_CLASS_ID(EncodeP, Type, 6) |
0 | 601 |
3842 | 602 DEFINE_CLASS_ID(Proj, Node, 3) |
603 DEFINE_CLASS_ID(CatchProj, Proj, 0) | |
604 DEFINE_CLASS_ID(JumpProj, Proj, 1) | |
605 DEFINE_CLASS_ID(IfTrue, Proj, 2) | |
606 DEFINE_CLASS_ID(IfFalse, Proj, 3) | |
607 DEFINE_CLASS_ID(Parm, Proj, 4) | |
608 DEFINE_CLASS_ID(MachProj, Proj, 5) | |
609 | |
610 DEFINE_CLASS_ID(Mem, Node, 4) | |
0 | 611 DEFINE_CLASS_ID(Load, Mem, 0) |
3842 | 612 DEFINE_CLASS_ID(VectorLoad, Load, 0) |
0 | 613 DEFINE_CLASS_ID(Store, Mem, 1) |
3842 | 614 DEFINE_CLASS_ID(VectorStore, Store, 0) |
0 | 615 DEFINE_CLASS_ID(LoadStore, Mem, 2) |
616 | |
3842 | 617 DEFINE_CLASS_ID(Region, Node, 5) |
618 DEFINE_CLASS_ID(Loop, Region, 0) | |
619 DEFINE_CLASS_ID(Root, Loop, 0) | |
620 DEFINE_CLASS_ID(CountedLoop, Loop, 1) | |
621 | |
622 DEFINE_CLASS_ID(Sub, Node, 6) | |
623 DEFINE_CLASS_ID(Cmp, Sub, 0) | |
624 DEFINE_CLASS_ID(FastLock, Cmp, 0) | |
625 DEFINE_CLASS_ID(FastUnlock, Cmp, 1) | |
626 | |
0 | 627 DEFINE_CLASS_ID(MergeMem, Node, 7) |
628 DEFINE_CLASS_ID(Bool, Node, 8) | |
629 DEFINE_CLASS_ID(AddP, Node, 9) | |
630 DEFINE_CLASS_ID(BoxLock, Node, 10) | |
631 DEFINE_CLASS_ID(Add, Node, 11) | |
3842 | 632 DEFINE_CLASS_ID(Vector, Node, 12) |
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633 DEFINE_CLASS_ID(ClearArray, Node, 13) |
0 | 634 |
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635 _max_classes = ClassMask_ClearArray |
0 | 636 }; |
637 #undef DEFINE_CLASS_ID | |
638 | |
639 // Flags are sorted by usage frequency. | |
640 enum NodeFlags { | |
641 Flag_is_Copy = 0x01, // should be first bit to avoid shift | |
3842 | 642 Flag_rematerialize = Flag_is_Copy << 1, |
0 | 643 Flag_needs_anti_dependence_check = Flag_rematerialize << 1, |
644 Flag_is_macro = Flag_needs_anti_dependence_check << 1, | |
645 Flag_is_Con = Flag_is_macro << 1, | |
646 Flag_is_cisc_alternate = Flag_is_Con << 1, | |
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647 Flag_is_dead_loop_safe = Flag_is_cisc_alternate << 1, |
0 | 648 Flag_may_be_short_branch = Flag_is_dead_loop_safe << 1, |
3851 | 649 Flag_avoid_back_to_back = Flag_may_be_short_branch << 1, |
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650 Flag_has_call = Flag_avoid_back_to_back << 1, |
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651 _max_flags = (Flag_has_call << 1) - 1 // allow flags combination |
0 | 652 }; |
653 | |
654 private: | |
655 jushort _class_id; | |
656 jushort _flags; | |
657 | |
658 protected: | |
659 // These methods should be called from constructors only. | |
660 void init_class_id(jushort c) { | |
661 assert(c <= _max_classes, "invalid node class"); | |
662 _class_id = c; // cast out const | |
663 } | |
664 void init_flags(jushort fl) { | |
665 assert(fl <= _max_flags, "invalid node flag"); | |
666 _flags |= fl; | |
667 } | |
668 void clear_flag(jushort fl) { | |
669 assert(fl <= _max_flags, "invalid node flag"); | |
670 _flags &= ~fl; | |
671 } | |
672 | |
673 public: | |
674 const jushort class_id() const { return _class_id; } | |
675 | |
676 const jushort flags() const { return _flags; } | |
677 | |
678 // Return a dense integer opcode number | |
679 virtual int Opcode() const; | |
680 | |
681 // Virtual inherited Node size | |
682 virtual uint size_of() const; | |
683 | |
684 // Other interesting Node properties | |
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685 #define DEFINE_CLASS_QUERY(type) \ |
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686 bool is_##type() const { \ |
0 | 687 return ((_class_id & ClassMask_##type) == Class_##type); \ |
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688 } \ |
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689 type##Node *as_##type() const { \ |
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690 assert(is_##type(), "invalid node class"); \ |
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691 return (type##Node*)this; \ |
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692 } \ |
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693 type##Node* isa_##type() const { \ |
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694 return (is_##type()) ? as_##type() : NULL; \ |
0 | 695 } |
696 | |
697 DEFINE_CLASS_QUERY(AbstractLock) | |
698 DEFINE_CLASS_QUERY(Add) | |
699 DEFINE_CLASS_QUERY(AddP) | |
700 DEFINE_CLASS_QUERY(Allocate) | |
701 DEFINE_CLASS_QUERY(AllocateArray) | |
702 DEFINE_CLASS_QUERY(Bool) | |
703 DEFINE_CLASS_QUERY(BoxLock) | |
3842 | 704 DEFINE_CLASS_QUERY(Call) |
0 | 705 DEFINE_CLASS_QUERY(CallDynamicJava) |
706 DEFINE_CLASS_QUERY(CallJava) | |
707 DEFINE_CLASS_QUERY(CallLeaf) | |
708 DEFINE_CLASS_QUERY(CallRuntime) | |
709 DEFINE_CLASS_QUERY(CallStaticJava) | |
710 DEFINE_CLASS_QUERY(Catch) | |
711 DEFINE_CLASS_QUERY(CatchProj) | |
712 DEFINE_CLASS_QUERY(CheckCastPP) | |
713 DEFINE_CLASS_QUERY(ConstraintCast) | |
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714 DEFINE_CLASS_QUERY(ClearArray) |
0 | 715 DEFINE_CLASS_QUERY(CMove) |
716 DEFINE_CLASS_QUERY(Cmp) | |
717 DEFINE_CLASS_QUERY(CountedLoop) | |
718 DEFINE_CLASS_QUERY(CountedLoopEnd) | |
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719 DEFINE_CLASS_QUERY(DecodeN) |
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720 DEFINE_CLASS_QUERY(EncodeP) |
0 | 721 DEFINE_CLASS_QUERY(FastLock) |
722 DEFINE_CLASS_QUERY(FastUnlock) | |
723 DEFINE_CLASS_QUERY(If) | |
724 DEFINE_CLASS_QUERY(IfFalse) | |
725 DEFINE_CLASS_QUERY(IfTrue) | |
726 DEFINE_CLASS_QUERY(Initialize) | |
727 DEFINE_CLASS_QUERY(Jump) | |
728 DEFINE_CLASS_QUERY(JumpProj) | |
729 DEFINE_CLASS_QUERY(Load) | |
730 DEFINE_CLASS_QUERY(LoadStore) | |
731 DEFINE_CLASS_QUERY(Lock) | |
732 DEFINE_CLASS_QUERY(Loop) | |
733 DEFINE_CLASS_QUERY(Mach) | |
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734 DEFINE_CLASS_QUERY(MachBranch) |
0 | 735 DEFINE_CLASS_QUERY(MachCall) |
736 DEFINE_CLASS_QUERY(MachCallDynamicJava) | |
737 DEFINE_CLASS_QUERY(MachCallJava) | |
738 DEFINE_CLASS_QUERY(MachCallLeaf) | |
739 DEFINE_CLASS_QUERY(MachCallRuntime) | |
740 DEFINE_CLASS_QUERY(MachCallStaticJava) | |
2008 | 741 DEFINE_CLASS_QUERY(MachConstantBase) |
742 DEFINE_CLASS_QUERY(MachConstant) | |
3842 | 743 DEFINE_CLASS_QUERY(MachGoto) |
0 | 744 DEFINE_CLASS_QUERY(MachIf) |
745 DEFINE_CLASS_QUERY(MachNullCheck) | |
3842 | 746 DEFINE_CLASS_QUERY(MachProj) |
0 | 747 DEFINE_CLASS_QUERY(MachReturn) |
748 DEFINE_CLASS_QUERY(MachSafePoint) | |
749 DEFINE_CLASS_QUERY(MachSpillCopy) | |
750 DEFINE_CLASS_QUERY(MachTemp) | |
751 DEFINE_CLASS_QUERY(Mem) | |
752 DEFINE_CLASS_QUERY(MemBar) | |
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753 DEFINE_CLASS_QUERY(MemBarStoreStore) |
0 | 754 DEFINE_CLASS_QUERY(MergeMem) |
755 DEFINE_CLASS_QUERY(Multi) | |
756 DEFINE_CLASS_QUERY(MultiBranch) | |
33 | 757 DEFINE_CLASS_QUERY(Parm) |
0 | 758 DEFINE_CLASS_QUERY(PCTable) |
759 DEFINE_CLASS_QUERY(Phi) | |
760 DEFINE_CLASS_QUERY(Proj) | |
761 DEFINE_CLASS_QUERY(Region) | |
762 DEFINE_CLASS_QUERY(Root) | |
763 DEFINE_CLASS_QUERY(SafePoint) | |
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764 DEFINE_CLASS_QUERY(SafePointScalarObject) |
0 | 765 DEFINE_CLASS_QUERY(Start) |
766 DEFINE_CLASS_QUERY(Store) | |
767 DEFINE_CLASS_QUERY(Sub) | |
768 DEFINE_CLASS_QUERY(Type) | |
3842 | 769 DEFINE_CLASS_QUERY(Vector) |
770 DEFINE_CLASS_QUERY(VectorLoad) | |
771 DEFINE_CLASS_QUERY(VectorStore) | |
0 | 772 DEFINE_CLASS_QUERY(Unlock) |
773 | |
774 #undef DEFINE_CLASS_QUERY | |
775 | |
776 // duplicate of is_MachSpillCopy() | |
777 bool is_SpillCopy () const { | |
778 return ((_class_id & ClassMask_MachSpillCopy) == Class_MachSpillCopy); | |
779 } | |
780 | |
781 bool is_Con () const { return (_flags & Flag_is_Con) != 0; } | |
782 // The data node which is safe to leave in dead loop during IGVN optimization. | |
783 bool is_dead_loop_safe() const { | |
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784 return is_Phi() || (is_Proj() && in(0) == NULL) || |
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785 ((_flags & (Flag_is_dead_loop_safe | Flag_is_Con)) != 0 && |
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786 (!is_Proj() || !in(0)->is_Allocate())); |
0 | 787 } |
788 | |
789 // is_Copy() returns copied edge index (0 or 1) | |
790 uint is_Copy() const { return (_flags & Flag_is_Copy); } | |
791 | |
792 virtual bool is_CFG() const { return false; } | |
793 | |
794 // If this node is control-dependent on a test, can it be | |
795 // rerouted to a dominating equivalent test? This is usually | |
796 // true of non-CFG nodes, but can be false for operations which | |
797 // depend for their correct sequencing on more than one test. | |
798 // (In that case, hoisting to a dominating test may silently | |
799 // skip some other important test.) | |
800 virtual bool depends_only_on_test() const { assert(!is_CFG(), ""); return true; }; | |
801 | |
802 // When building basic blocks, I need to have a notion of block beginning | |
803 // Nodes, next block selector Nodes (block enders), and next block | |
804 // projections. These calls need to work on their machine equivalents. The | |
805 // Ideal beginning Nodes are RootNode, RegionNode and StartNode. | |
806 bool is_block_start() const { | |
807 if ( is_Region() ) | |
808 return this == (const Node*)in(0); | |
809 else | |
3842 | 810 return is_Start(); |
0 | 811 } |
812 | |
813 // The Ideal control projection Nodes are IfTrue/IfFalse, JumpProjNode, Root, | |
814 // Goto and Return. This call also returns the block ending Node. | |
815 virtual const Node *is_block_proj() const; | |
816 | |
817 // The node is a "macro" node which needs to be expanded before matching | |
818 bool is_macro() const { return (_flags & Flag_is_macro) != 0; } | |
819 | |
820 //----------------- Optimization | |
821 | |
822 // Get the worst-case Type output for this Node. | |
823 virtual const class Type *bottom_type() const; | |
824 | |
825 // If we find a better type for a node, try to record it permanently. | |
826 // Return true if this node actually changed. | |
827 // Be sure to do the hash_delete game in the "rehash" variant. | |
828 void raise_bottom_type(const Type* new_type); | |
829 | |
830 // Get the address type with which this node uses and/or defs memory, | |
831 // or NULL if none. The address type is conservatively wide. | |
832 // Returns non-null for calls, membars, loads, stores, etc. | |
833 // Returns TypePtr::BOTTOM if the node touches memory "broadly". | |
834 virtual const class TypePtr *adr_type() const { return NULL; } | |
835 | |
836 // Return an existing node which computes the same function as this node. | |
837 // The optimistic combined algorithm requires this to return a Node which | |
838 // is a small number of steps away (e.g., one of my inputs). | |
839 virtual Node *Identity( PhaseTransform *phase ); | |
840 | |
841 // Return the set of values this Node can take on at runtime. | |
842 virtual const Type *Value( PhaseTransform *phase ) const; | |
843 | |
844 // Return a node which is more "ideal" than the current node. | |
845 // The invariants on this call are subtle. If in doubt, read the | |
846 // treatise in node.cpp above the default implemention AND TEST WITH | |
847 // +VerifyIterativeGVN! | |
848 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
849 | |
850 // Some nodes have specific Ideal subgraph transformations only if they are | |
851 // unique users of specific nodes. Such nodes should be put on IGVN worklist | |
852 // for the transformations to happen. | |
853 bool has_special_unique_user() const; | |
854 | |
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855 // Skip Proj and CatchProj nodes chains. Check for Null and Top. |
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856 Node* find_exact_control(Node* ctrl); |
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857 |
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858 // Check if 'this' node dominates or equal to 'sub'. |
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859 bool dominates(Node* sub, Node_List &nlist); |
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860 |
0 | 861 protected: |
862 bool remove_dead_region(PhaseGVN *phase, bool can_reshape); | |
863 public: | |
864 | |
865 // Idealize graph, using DU info. Done after constant propagation | |
866 virtual Node *Ideal_DU_postCCP( PhaseCCP *ccp ); | |
867 | |
868 // See if there is valid pipeline info | |
869 static const Pipeline *pipeline_class(); | |
870 virtual const Pipeline *pipeline() const; | |
871 | |
872 // Compute the latency from the def to this instruction of the ith input node | |
873 uint latency(uint i); | |
874 | |
875 // Hash & compare functions, for pessimistic value numbering | |
876 | |
877 // If the hash function returns the special sentinel value NO_HASH, | |
878 // the node is guaranteed never to compare equal to any other node. | |
605 | 879 // If we accidentally generate a hash with value NO_HASH the node |
0 | 880 // won't go into the table and we'll lose a little optimization. |
881 enum { NO_HASH = 0 }; | |
882 virtual uint hash() const; | |
883 virtual uint cmp( const Node &n ) const; | |
884 | |
885 // Operation appears to be iteratively computed (such as an induction variable) | |
886 // It is possible for this operation to return false for a loop-varying | |
887 // value, if it appears (by local graph inspection) to be computed by a simple conditional. | |
888 bool is_iteratively_computed(); | |
889 | |
890 // Determine if a node is Counted loop induction variable. | |
891 // The method is defined in loopnode.cpp. | |
892 const Node* is_loop_iv() const; | |
893 | |
894 // Return a node with opcode "opc" and same inputs as "this" if one can | |
895 // be found; Otherwise return NULL; | |
896 Node* find_similar(int opc); | |
897 | |
898 // Return the unique control out if only one. Null if none or more than one. | |
899 Node* unique_ctrl_out(); | |
900 | |
901 //----------------- Code Generation | |
902 | |
903 // Ideal register class for Matching. Zero means unmatched instruction | |
904 // (these are cloned instead of converted to machine nodes). | |
905 virtual uint ideal_reg() const; | |
906 | |
907 static const uint NotAMachineReg; // must be > max. machine register | |
908 | |
909 // Do we Match on this edge index or not? Generally false for Control | |
910 // and true for everything else. Weird for calls & returns. | |
911 virtual uint match_edge(uint idx) const; | |
912 | |
913 // Register class output is returned in | |
914 virtual const RegMask &out_RegMask() const; | |
915 // Register class input is expected in | |
916 virtual const RegMask &in_RegMask(uint) const; | |
917 // Should we clone rather than spill this instruction? | |
918 bool rematerialize() const; | |
919 | |
920 // Return JVM State Object if this Node carries debug info, or NULL otherwise | |
921 virtual JVMState* jvms() const; | |
922 | |
923 // Print as assembly | |
924 virtual void format( PhaseRegAlloc *, outputStream* st = tty ) const; | |
925 // Emit bytes starting at parameter 'ptr' | |
926 // Bump 'ptr' by the number of output bytes | |
927 virtual void emit(CodeBuffer &cbuf, PhaseRegAlloc *ra_) const; | |
928 // Size of instruction in bytes | |
929 virtual uint size(PhaseRegAlloc *ra_) const; | |
930 | |
931 // Convenience function to extract an integer constant from a node. | |
932 // If it is not an integer constant (either Con, CastII, or Mach), | |
933 // return value_if_unknown. | |
934 jint find_int_con(jint value_if_unknown) const { | |
935 const TypeInt* t = find_int_type(); | |
936 return (t != NULL && t->is_con()) ? t->get_con() : value_if_unknown; | |
937 } | |
938 // Return the constant, knowing it is an integer constant already | |
939 jint get_int() const { | |
940 const TypeInt* t = find_int_type(); | |
941 guarantee(t != NULL, "must be con"); | |
942 return t->get_con(); | |
943 } | |
944 // Here's where the work is done. Can produce non-constant int types too. | |
945 const TypeInt* find_int_type() const; | |
946 | |
947 // Same thing for long (and intptr_t, via type.hpp): | |
948 jlong get_long() const { | |
949 const TypeLong* t = find_long_type(); | |
950 guarantee(t != NULL, "must be con"); | |
951 return t->get_con(); | |
952 } | |
953 jlong find_long_con(jint value_if_unknown) const { | |
954 const TypeLong* t = find_long_type(); | |
955 return (t != NULL && t->is_con()) ? t->get_con() : value_if_unknown; | |
956 } | |
957 const TypeLong* find_long_type() const; | |
958 | |
959 // These guys are called by code generated by ADLC: | |
960 intptr_t get_ptr() const; | |
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961 intptr_t get_narrowcon() const; |
0 | 962 jdouble getd() const; |
963 jfloat getf() const; | |
964 | |
965 // Nodes which are pinned into basic blocks | |
966 virtual bool pinned() const { return false; } | |
967 | |
968 // Nodes which use memory without consuming it, hence need antidependences | |
969 // More specifically, needs_anti_dependence_check returns true iff the node | |
970 // (a) does a load, and (b) does not perform a store (except perhaps to a | |
971 // stack slot or some other unaliased location). | |
972 bool needs_anti_dependence_check() const; | |
973 | |
974 // Return which operand this instruction may cisc-spill. In other words, | |
975 // return operand position that can convert from reg to memory access | |
976 virtual int cisc_operand() const { return AdlcVMDeps::Not_cisc_spillable; } | |
977 bool is_cisc_alternate() const { return (_flags & Flag_is_cisc_alternate) != 0; } | |
978 | |
979 //----------------- Graph walking | |
980 public: | |
981 // Walk and apply member functions recursively. | |
982 // Supplied (this) pointer is root. | |
983 void walk(NFunc pre, NFunc post, void *env); | |
984 static void nop(Node &, void*); // Dummy empty function | |
985 static void packregion( Node &n, void* ); | |
986 private: | |
987 void walk_(NFunc pre, NFunc post, void *env, VectorSet &visited); | |
988 | |
989 //----------------- Printing, etc | |
990 public: | |
991 #ifndef PRODUCT | |
992 Node* find(int idx) const; // Search the graph for the given idx. | |
993 Node* find_ctrl(int idx) const; // Search control ancestors for the given idx. | |
994 void dump() const; // Print this node, | |
995 void dump(int depth) const; // Print this node, recursively to depth d | |
996 void dump_ctrl(int depth) const; // Print control nodes, to depth d | |
997 virtual void dump_req() const; // Print required-edge info | |
998 virtual void dump_prec() const; // Print precedence-edge info | |
999 virtual void dump_out() const; // Print the output edge info | |
1000 virtual void dump_spec(outputStream *st) const {}; // Print per-node info | |
1001 void verify_edges(Unique_Node_List &visited); // Verify bi-directional edges | |
1002 void verify() const; // Check Def-Use info for my subgraph | |
1003 static void verify_recur(const Node *n, int verify_depth, VectorSet &old_space, VectorSet &new_space); | |
1004 | |
1005 // This call defines a class-unique string used to identify class instances | |
1006 virtual const char *Name() const; | |
1007 | |
1008 void dump_format(PhaseRegAlloc *ra) const; // debug access to MachNode::format(...) | |
1009 // RegMask Print Functions | |
1010 void dump_in_regmask(int idx) { in_RegMask(idx).dump(); } | |
1011 void dump_out_regmask() { out_RegMask().dump(); } | |
1012 static int _in_dump_cnt; | |
1013 static bool in_dump() { return _in_dump_cnt > 0; } | |
1014 void fast_dump() const { | |
1015 tty->print("%4d: %-17s", _idx, Name()); | |
1016 for (uint i = 0; i < len(); i++) | |
1017 if (in(i)) | |
1018 tty->print(" %4d", in(i)->_idx); | |
1019 else | |
1020 tty->print(" NULL"); | |
1021 tty->print("\n"); | |
1022 } | |
1023 #endif | |
1024 #ifdef ASSERT | |
1025 void verify_construction(); | |
1026 bool verify_jvms(const JVMState* jvms) const; | |
1027 int _debug_idx; // Unique value assigned to every node. | |
1028 int debug_idx() const { return _debug_idx; } | |
1029 void set_debug_idx( int debug_idx ) { _debug_idx = debug_idx; } | |
1030 | |
1031 Node* _debug_orig; // Original version of this, if any. | |
1032 Node* debug_orig() const { return _debug_orig; } | |
1033 void set_debug_orig(Node* orig); // _debug_orig = orig | |
1034 | |
1035 int _hash_lock; // Barrier to modifications of nodes in the hash table | |
1036 void enter_hash_lock() { ++_hash_lock; assert(_hash_lock < 99, "in too many hash tables?"); } | |
1037 void exit_hash_lock() { --_hash_lock; assert(_hash_lock >= 0, "mispaired hash locks"); } | |
1038 | |
1039 static void init_NodeProperty(); | |
1040 | |
1041 #if OPTO_DU_ITERATOR_ASSERT | |
1042 const Node* _last_del; // The last deleted node. | |
1043 uint _del_tick; // Bumped when a deletion happens.. | |
1044 #endif | |
1045 #endif | |
1046 }; | |
1047 | |
1048 //----------------------------------------------------------------------------- | |
1049 // Iterators over DU info, and associated Node functions. | |
1050 | |
1051 #if OPTO_DU_ITERATOR_ASSERT | |
1052 | |
1053 // Common code for assertion checking on DU iterators. | |
1054 class DUIterator_Common VALUE_OBJ_CLASS_SPEC { | |
1055 #ifdef ASSERT | |
1056 protected: | |
1057 bool _vdui; // cached value of VerifyDUIterators | |
1058 const Node* _node; // the node containing the _out array | |
1059 uint _outcnt; // cached node->_outcnt | |
1060 uint _del_tick; // cached node->_del_tick | |
1061 Node* _last; // last value produced by the iterator | |
1062 | |
1063 void sample(const Node* node); // used by c'tor to set up for verifies | |
1064 void verify(const Node* node, bool at_end_ok = false); | |
1065 void verify_resync(); | |
1066 void reset(const DUIterator_Common& that); | |
1067 | |
1068 // The VDUI_ONLY macro protects code conditionalized on VerifyDUIterators | |
1069 #define I_VDUI_ONLY(i,x) { if ((i)._vdui) { x; } } | |
1070 #else | |
1071 #define I_VDUI_ONLY(i,x) { } | |
1072 #endif //ASSERT | |
1073 }; | |
1074 | |
1075 #define VDUI_ONLY(x) I_VDUI_ONLY(*this, x) | |
1076 | |
1077 // Default DU iterator. Allows appends onto the out array. | |
1078 // Allows deletion from the out array only at the current point. | |
1079 // Usage: | |
1080 // for (DUIterator i = x->outs(); x->has_out(i); i++) { | |
1081 // Node* y = x->out(i); | |
1082 // ... | |
1083 // } | |
1084 // Compiles in product mode to a unsigned integer index, which indexes | |
1085 // onto a repeatedly reloaded base pointer of x->_out. The loop predicate | |
1086 // also reloads x->_outcnt. If you delete, you must perform "--i" just | |
1087 // before continuing the loop. You must delete only the last-produced | |
1088 // edge. You must delete only a single copy of the last-produced edge, | |
1089 // or else you must delete all copies at once (the first time the edge | |
1090 // is produced by the iterator). | |
1091 class DUIterator : public DUIterator_Common { | |
1092 friend class Node; | |
1093 | |
1094 // This is the index which provides the product-mode behavior. | |
1095 // Whatever the product-mode version of the system does to the | |
1096 // DUI index is done to this index. All other fields in | |
1097 // this class are used only for assertion checking. | |
1098 uint _idx; | |
1099 | |
1100 #ifdef ASSERT | |
1101 uint _refresh_tick; // Records the refresh activity. | |
1102 | |
1103 void sample(const Node* node); // Initialize _refresh_tick etc. | |
1104 void verify(const Node* node, bool at_end_ok = false); | |
1105 void verify_increment(); // Verify an increment operation. | |
1106 void verify_resync(); // Verify that we can back up over a deletion. | |
1107 void verify_finish(); // Verify that the loop terminated properly. | |
1108 void refresh(); // Resample verification info. | |
1109 void reset(const DUIterator& that); // Resample after assignment. | |
1110 #endif | |
1111 | |
1112 DUIterator(const Node* node, int dummy_to_avoid_conversion) | |
1113 { _idx = 0; debug_only(sample(node)); } | |
1114 | |
1115 public: | |
1116 // initialize to garbage; clear _vdui to disable asserts | |
1117 DUIterator() | |
1118 { /*initialize to garbage*/ debug_only(_vdui = false); } | |
1119 | |
1120 void operator++(int dummy_to_specify_postfix_op) | |
1121 { _idx++; VDUI_ONLY(verify_increment()); } | |
1122 | |
1123 void operator--() | |
1124 { VDUI_ONLY(verify_resync()); --_idx; } | |
1125 | |
1126 ~DUIterator() | |
1127 { VDUI_ONLY(verify_finish()); } | |
1128 | |
1129 void operator=(const DUIterator& that) | |
1130 { _idx = that._idx; debug_only(reset(that)); } | |
1131 }; | |
1132 | |
1133 DUIterator Node::outs() const | |
1134 { return DUIterator(this, 0); } | |
1135 DUIterator& Node::refresh_out_pos(DUIterator& i) const | |
1136 { I_VDUI_ONLY(i, i.refresh()); return i; } | |
1137 bool Node::has_out(DUIterator& i) const | |
1138 { I_VDUI_ONLY(i, i.verify(this,true));return i._idx < _outcnt; } | |
1139 Node* Node::out(DUIterator& i) const | |
1140 { I_VDUI_ONLY(i, i.verify(this)); return debug_only(i._last=) _out[i._idx]; } | |
1141 | |
1142 | |
1143 // Faster DU iterator. Disallows insertions into the out array. | |
1144 // Allows deletion from the out array only at the current point. | |
1145 // Usage: | |
1146 // for (DUIterator_Fast imax, i = x->fast_outs(imax); i < imax; i++) { | |
1147 // Node* y = x->fast_out(i); | |
1148 // ... | |
1149 // } | |
1150 // Compiles in product mode to raw Node** pointer arithmetic, with | |
1151 // no reloading of pointers from the original node x. If you delete, | |
1152 // you must perform "--i; --imax" just before continuing the loop. | |
1153 // If you delete multiple copies of the same edge, you must decrement | |
1154 // imax, but not i, multiple times: "--i, imax -= num_edges". | |
1155 class DUIterator_Fast : public DUIterator_Common { | |
1156 friend class Node; | |
1157 friend class DUIterator_Last; | |
1158 | |
1159 // This is the pointer which provides the product-mode behavior. | |
1160 // Whatever the product-mode version of the system does to the | |
1161 // DUI pointer is done to this pointer. All other fields in | |
1162 // this class are used only for assertion checking. | |
1163 Node** _outp; | |
1164 | |
1165 #ifdef ASSERT | |
1166 void verify(const Node* node, bool at_end_ok = false); | |
1167 void verify_limit(); | |
1168 void verify_resync(); | |
1169 void verify_relimit(uint n); | |
1170 void reset(const DUIterator_Fast& that); | |
1171 #endif | |
1172 | |
1173 // Note: offset must be signed, since -1 is sometimes passed | |
1174 DUIterator_Fast(const Node* node, ptrdiff_t offset) | |
1175 { _outp = node->_out + offset; debug_only(sample(node)); } | |
1176 | |
1177 public: | |
1178 // initialize to garbage; clear _vdui to disable asserts | |
1179 DUIterator_Fast() | |
1180 { /*initialize to garbage*/ debug_only(_vdui = false); } | |
1181 | |
1182 void operator++(int dummy_to_specify_postfix_op) | |
1183 { _outp++; VDUI_ONLY(verify(_node, true)); } | |
1184 | |
1185 void operator--() | |
1186 { VDUI_ONLY(verify_resync()); --_outp; } | |
1187 | |
1188 void operator-=(uint n) // applied to the limit only | |
1189 { _outp -= n; VDUI_ONLY(verify_relimit(n)); } | |
1190 | |
1191 bool operator<(DUIterator_Fast& limit) { | |
1192 I_VDUI_ONLY(*this, this->verify(_node, true)); | |
1193 I_VDUI_ONLY(limit, limit.verify_limit()); | |
1194 return _outp < limit._outp; | |
1195 } | |
1196 | |
1197 void operator=(const DUIterator_Fast& that) | |
1198 { _outp = that._outp; debug_only(reset(that)); } | |
1199 }; | |
1200 | |
1201 DUIterator_Fast Node::fast_outs(DUIterator_Fast& imax) const { | |
1202 // Assign a limit pointer to the reference argument: | |
1203 imax = DUIterator_Fast(this, (ptrdiff_t)_outcnt); | |
1204 // Return the base pointer: | |
1205 return DUIterator_Fast(this, 0); | |
1206 } | |
1207 Node* Node::fast_out(DUIterator_Fast& i) const { | |
1208 I_VDUI_ONLY(i, i.verify(this)); | |
1209 return debug_only(i._last=) *i._outp; | |
1210 } | |
1211 | |
1212 | |
1213 // Faster DU iterator. Requires each successive edge to be removed. | |
1214 // Does not allow insertion of any edges. | |
1215 // Usage: | |
1216 // for (DUIterator_Last imin, i = x->last_outs(imin); i >= imin; i -= num_edges) { | |
1217 // Node* y = x->last_out(i); | |
1218 // ... | |
1219 // } | |
1220 // Compiles in product mode to raw Node** pointer arithmetic, with | |
1221 // no reloading of pointers from the original node x. | |
1222 class DUIterator_Last : private DUIterator_Fast { | |
1223 friend class Node; | |
1224 | |
1225 #ifdef ASSERT | |
1226 void verify(const Node* node, bool at_end_ok = false); | |
1227 void verify_limit(); | |
1228 void verify_step(uint num_edges); | |
1229 #endif | |
1230 | |
1231 // Note: offset must be signed, since -1 is sometimes passed | |
1232 DUIterator_Last(const Node* node, ptrdiff_t offset) | |
1233 : DUIterator_Fast(node, offset) { } | |
1234 | |
1235 void operator++(int dummy_to_specify_postfix_op) {} // do not use | |
1236 void operator<(int) {} // do not use | |
1237 | |
1238 public: | |
1239 DUIterator_Last() { } | |
1240 // initialize to garbage | |
1241 | |
1242 void operator--() | |
1243 { _outp--; VDUI_ONLY(verify_step(1)); } | |
1244 | |
1245 void operator-=(uint n) | |
1246 { _outp -= n; VDUI_ONLY(verify_step(n)); } | |
1247 | |
1248 bool operator>=(DUIterator_Last& limit) { | |
1249 I_VDUI_ONLY(*this, this->verify(_node, true)); | |
1250 I_VDUI_ONLY(limit, limit.verify_limit()); | |
1251 return _outp >= limit._outp; | |
1252 } | |
1253 | |
1254 void operator=(const DUIterator_Last& that) | |
1255 { DUIterator_Fast::operator=(that); } | |
1256 }; | |
1257 | |
1258 DUIterator_Last Node::last_outs(DUIterator_Last& imin) const { | |
1259 // Assign a limit pointer to the reference argument: | |
1260 imin = DUIterator_Last(this, 0); | |
1261 // Return the initial pointer: | |
1262 return DUIterator_Last(this, (ptrdiff_t)_outcnt - 1); | |
1263 } | |
1264 Node* Node::last_out(DUIterator_Last& i) const { | |
1265 I_VDUI_ONLY(i, i.verify(this)); | |
1266 return debug_only(i._last=) *i._outp; | |
1267 } | |
1268 | |
1269 #endif //OPTO_DU_ITERATOR_ASSERT | |
1270 | |
1271 #undef I_VDUI_ONLY | |
1272 #undef VDUI_ONLY | |
1273 | |
1080
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1274 // An Iterator that truly follows the iterator pattern. Doesn't |
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1275 // support deletion but could be made to. |
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1276 // |
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1277 // for (SimpleDUIterator i(n); i.has_next(); i.next()) { |
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1278 // Node* m = i.get(); |
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1279 // |
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1280 class SimpleDUIterator : public StackObj { |
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1281 private: |
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1282 Node* node; |
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1283 DUIterator_Fast i; |
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1284 DUIterator_Fast imax; |
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1285 public: |
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1286 SimpleDUIterator(Node* n): node(n), i(n->fast_outs(imax)) {} |
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1287 bool has_next() { return i < imax; } |
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1288 void next() { i++; } |
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1289 Node* get() { return node->fast_out(i); } |
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1290 }; |
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1291 |
0 | 1292 |
1293 //----------------------------------------------------------------------------- | |
1294 // Map dense integer indices to Nodes. Uses classic doubling-array trick. | |
1295 // Abstractly provides an infinite array of Node*'s, initialized to NULL. | |
1296 // Note that the constructor just zeros things, and since I use Arena | |
1297 // allocation I do not need a destructor to reclaim storage. | |
1298 class Node_Array : public ResourceObj { | |
3939 | 1299 friend class VMStructs; |
0 | 1300 protected: |
1301 Arena *_a; // Arena to allocate in | |
1302 uint _max; | |
1303 Node **_nodes; | |
1304 void grow( uint i ); // Grow array node to fit | |
1305 public: | |
1306 Node_Array(Arena *a) : _a(a), _max(OptoNodeListSize) { | |
1307 _nodes = NEW_ARENA_ARRAY( a, Node *, OptoNodeListSize ); | |
1308 for( int i = 0; i < OptoNodeListSize; i++ ) { | |
1309 _nodes[i] = NULL; | |
1310 } | |
1311 } | |
1312 | |
1313 Node_Array(Node_Array *na) : _a(na->_a), _max(na->_max), _nodes(na->_nodes) {} | |
1314 Node *operator[] ( uint i ) const // Lookup, or NULL for not mapped | |
1315 { return (i<_max) ? _nodes[i] : (Node*)NULL; } | |
1316 Node *at( uint i ) const { assert(i<_max,"oob"); return _nodes[i]; } | |
1317 Node **adr() { return _nodes; } | |
1318 // Extend the mapping: index i maps to Node *n. | |
1319 void map( uint i, Node *n ) { if( i>=_max ) grow(i); _nodes[i] = n; } | |
1320 void insert( uint i, Node *n ); | |
1321 void remove( uint i ); // Remove, preserving order | |
1322 void sort( C_sort_func_t func); | |
1323 void reset( Arena *new_a ); // Zap mapping to empty; reclaim storage | |
1324 void clear(); // Set all entries to NULL, keep storage | |
1325 uint Size() const { return _max; } | |
1326 void dump() const; | |
1327 }; | |
1328 | |
1329 class Node_List : public Node_Array { | |
3939 | 1330 friend class VMStructs; |
0 | 1331 uint _cnt; |
1332 public: | |
1333 Node_List() : Node_Array(Thread::current()->resource_area()), _cnt(0) {} | |
1334 Node_List(Arena *a) : Node_Array(a), _cnt(0) {} | |
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1335 bool contains(Node* n) { |
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1336 for (uint e = 0; e < size(); e++) { |
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1337 if (at(e) == n) return true; |
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1338 } |
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1339 return false; |
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1340 } |
0 | 1341 void insert( uint i, Node *n ) { Node_Array::insert(i,n); _cnt++; } |
1342 void remove( uint i ) { Node_Array::remove(i); _cnt--; } | |
1343 void push( Node *b ) { map(_cnt++,b); } | |
1344 void yank( Node *n ); // Find and remove | |
1345 Node *pop() { return _nodes[--_cnt]; } | |
1346 Node *rpop() { Node *b = _nodes[0]; _nodes[0]=_nodes[--_cnt]; return b;} | |
1347 void clear() { _cnt = 0; Node_Array::clear(); } // retain storage | |
1348 uint size() const { return _cnt; } | |
1349 void dump() const; | |
1350 }; | |
1351 | |
1352 //------------------------------Unique_Node_List------------------------------- | |
1353 class Unique_Node_List : public Node_List { | |
3939 | 1354 friend class VMStructs; |
0 | 1355 VectorSet _in_worklist; |
1356 uint _clock_index; // Index in list where to pop from next | |
1357 public: | |
1358 Unique_Node_List() : Node_List(), _in_worklist(Thread::current()->resource_area()), _clock_index(0) {} | |
1359 Unique_Node_List(Arena *a) : Node_List(a), _in_worklist(a), _clock_index(0) {} | |
1360 | |
1361 void remove( Node *n ); | |
1362 bool member( Node *n ) { return _in_worklist.test(n->_idx) != 0; } | |
1363 VectorSet &member_set(){ return _in_worklist; } | |
1364 | |
1365 void push( Node *b ) { | |
1366 if( !_in_worklist.test_set(b->_idx) ) | |
1367 Node_List::push(b); | |
1368 } | |
1369 Node *pop() { | |
1370 if( _clock_index >= size() ) _clock_index = 0; | |
1371 Node *b = at(_clock_index); | |
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1372 map( _clock_index, Node_List::pop()); |
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1373 if (size() != 0) _clock_index++; // Always start from 0 |
0 | 1374 _in_worklist >>= b->_idx; |
1375 return b; | |
1376 } | |
1377 Node *remove( uint i ) { | |
1378 Node *b = Node_List::at(i); | |
1379 _in_worklist >>= b->_idx; | |
1380 map(i,Node_List::pop()); | |
1381 return b; | |
1382 } | |
1383 void yank( Node *n ) { _in_worklist >>= n->_idx; Node_List::yank(n); } | |
1384 void clear() { | |
1385 _in_worklist.Clear(); // Discards storage but grows automatically | |
1386 Node_List::clear(); | |
1387 _clock_index = 0; | |
1388 } | |
1389 | |
1390 // Used after parsing to remove useless nodes before Iterative GVN | |
1391 void remove_useless_nodes(VectorSet &useful); | |
1392 | |
1393 #ifndef PRODUCT | |
1394 void print_set() const { _in_worklist.print(); } | |
1395 #endif | |
1396 }; | |
1397 | |
1398 // Inline definition of Compile::record_for_igvn must be deferred to this point. | |
1399 inline void Compile::record_for_igvn(Node* n) { | |
1400 _for_igvn->push(n); | |
1401 } | |
1402 | |
1403 //------------------------------Node_Stack------------------------------------- | |
1404 class Node_Stack { | |
3939 | 1405 friend class VMStructs; |
0 | 1406 protected: |
1407 struct INode { | |
1408 Node *node; // Processed node | |
1409 uint indx; // Index of next node's child | |
1410 }; | |
1411 INode *_inode_top; // tos, stack grows up | |
1412 INode *_inode_max; // End of _inodes == _inodes + _max | |
1413 INode *_inodes; // Array storage for the stack | |
1414 Arena *_a; // Arena to allocate in | |
1415 void grow(); | |
1416 public: | |
1417 Node_Stack(int size) { | |
1418 size_t max = (size > OptoNodeListSize) ? size : OptoNodeListSize; | |
1419 _a = Thread::current()->resource_area(); | |
1420 _inodes = NEW_ARENA_ARRAY( _a, INode, max ); | |
1421 _inode_max = _inodes + max; | |
1422 _inode_top = _inodes - 1; // stack is empty | |
1423 } | |
1424 | |
1425 Node_Stack(Arena *a, int size) : _a(a) { | |
1426 size_t max = (size > OptoNodeListSize) ? size : OptoNodeListSize; | |
1427 _inodes = NEW_ARENA_ARRAY( _a, INode, max ); | |
1428 _inode_max = _inodes + max; | |
1429 _inode_top = _inodes - 1; // stack is empty | |
1430 } | |
1431 | |
1432 void pop() { | |
1433 assert(_inode_top >= _inodes, "node stack underflow"); | |
1434 --_inode_top; | |
1435 } | |
1436 void push(Node *n, uint i) { | |
1437 ++_inode_top; | |
1438 if (_inode_top >= _inode_max) grow(); | |
1439 INode *top = _inode_top; // optimization | |
1440 top->node = n; | |
1441 top->indx = i; | |
1442 } | |
1443 Node *node() const { | |
1444 return _inode_top->node; | |
1445 } | |
1446 Node* node_at(uint i) const { | |
1447 assert(_inodes + i <= _inode_top, "in range"); | |
1448 return _inodes[i].node; | |
1449 } | |
1450 uint index() const { | |
1451 return _inode_top->indx; | |
1452 } | |
247 | 1453 uint index_at(uint i) const { |
1454 assert(_inodes + i <= _inode_top, "in range"); | |
1455 return _inodes[i].indx; | |
1456 } | |
0 | 1457 void set_node(Node *n) { |
1458 _inode_top->node = n; | |
1459 } | |
1460 void set_index(uint i) { | |
1461 _inode_top->indx = i; | |
1462 } | |
1463 uint size_max() const { return (uint)pointer_delta(_inode_max, _inodes, sizeof(INode)); } // Max size | |
40 | 1464 uint size() const { return (uint)pointer_delta((_inode_top+1), _inodes, sizeof(INode)); } // Current size |
0 | 1465 bool is_nonempty() const { return (_inode_top >= _inodes); } |
1466 bool is_empty() const { return (_inode_top < _inodes); } | |
1467 void clear() { _inode_top = _inodes - 1; } // retain storage | |
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1468 |
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1469 // Node_Stack is used to map nodes. |
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1470 Node* find(uint idx) const; |
0 | 1471 }; |
1472 | |
1473 | |
1474 //-----------------------------Node_Notes-------------------------------------- | |
1475 // Debugging or profiling annotations loosely and sparsely associated | |
1476 // with some nodes. See Compile::node_notes_at for the accessor. | |
1477 class Node_Notes VALUE_OBJ_CLASS_SPEC { | |
3939 | 1478 friend class VMStructs; |
0 | 1479 JVMState* _jvms; |
1480 | |
1481 public: | |
1482 Node_Notes(JVMState* jvms = NULL) { | |
1483 _jvms = jvms; | |
1484 } | |
1485 | |
1486 JVMState* jvms() { return _jvms; } | |
1487 void set_jvms(JVMState* x) { _jvms = x; } | |
1488 | |
1489 // True if there is nothing here. | |
1490 bool is_clear() { | |
1491 return (_jvms == NULL); | |
1492 } | |
1493 | |
1494 // Make there be nothing here. | |
1495 void clear() { | |
1496 _jvms = NULL; | |
1497 } | |
1498 | |
1499 // Make a new, clean node notes. | |
1500 static Node_Notes* make(Compile* C) { | |
1501 Node_Notes* nn = NEW_ARENA_ARRAY(C->comp_arena(), Node_Notes, 1); | |
1502 nn->clear(); | |
1503 return nn; | |
1504 } | |
1505 | |
1506 Node_Notes* clone(Compile* C) { | |
1507 Node_Notes* nn = NEW_ARENA_ARRAY(C->comp_arena(), Node_Notes, 1); | |
1508 (*nn) = (*this); | |
1509 return nn; | |
1510 } | |
1511 | |
1512 // Absorb any information from source. | |
1513 bool update_from(Node_Notes* source) { | |
1514 bool changed = false; | |
1515 if (source != NULL) { | |
1516 if (source->jvms() != NULL) { | |
1517 set_jvms(source->jvms()); | |
1518 changed = true; | |
1519 } | |
1520 } | |
1521 return changed; | |
1522 } | |
1523 }; | |
1524 | |
1525 // Inlined accessors for Compile::node_nodes that require the preceding class: | |
1526 inline Node_Notes* | |
1527 Compile::locate_node_notes(GrowableArray<Node_Notes*>* arr, | |
1528 int idx, bool can_grow) { | |
1529 assert(idx >= 0, "oob"); | |
1530 int block_idx = (idx >> _log2_node_notes_block_size); | |
1531 int grow_by = (block_idx - (arr == NULL? 0: arr->length())); | |
1532 if (grow_by >= 0) { | |
1533 if (!can_grow) return NULL; | |
1534 grow_node_notes(arr, grow_by + 1); | |
1535 } | |
1536 // (Every element of arr is a sub-array of length _node_notes_block_size.) | |
1537 return arr->at(block_idx) + (idx & (_node_notes_block_size-1)); | |
1538 } | |
1539 | |
1540 inline bool | |
1541 Compile::set_node_notes_at(int idx, Node_Notes* value) { | |
1542 if (value == NULL || value->is_clear()) | |
1543 return false; // nothing to write => write nothing | |
1544 Node_Notes* loc = locate_node_notes(_node_note_array, idx, true); | |
1545 assert(loc != NULL, ""); | |
1546 return loc->update_from(value); | |
1547 } | |
1548 | |
1549 | |
1550 //------------------------------TypeNode--------------------------------------- | |
1551 // Node with a Type constant. | |
1552 class TypeNode : public Node { | |
1553 protected: | |
1554 virtual uint hash() const; // Check the type | |
1555 virtual uint cmp( const Node &n ) const; | |
1556 virtual uint size_of() const; // Size is bigger | |
1557 const Type* const _type; | |
1558 public: | |
1559 void set_type(const Type* t) { | |
1560 assert(t != NULL, "sanity"); | |
1561 debug_only(uint check_hash = (VerifyHashTableKeys && _hash_lock) ? hash() : NO_HASH); | |
1562 *(const Type**)&_type = t; // cast away const-ness | |
1563 // If this node is in the hash table, make sure it doesn't need a rehash. | |
1564 assert(check_hash == NO_HASH || check_hash == hash(), "type change must preserve hash code"); | |
1565 } | |
1566 const Type* type() const { assert(_type != NULL, "sanity"); return _type; }; | |
1567 TypeNode( const Type *t, uint required ) : Node(required), _type(t) { | |
1568 init_class_id(Class_Type); | |
1569 } | |
1570 virtual const Type *Value( PhaseTransform *phase ) const; | |
1571 virtual const Type *bottom_type() const; | |
1572 virtual uint ideal_reg() const; | |
1573 #ifndef PRODUCT | |
1574 virtual void dump_spec(outputStream *st) const; | |
1575 #endif | |
1576 }; | |
1972 | 1577 |
1578 #endif // SHARE_VM_OPTO_NODE_HPP |